Try expanding your workspace over the 2 screens then tile the parts, assemblies etc
Autodesk Product Design Suit 2012
Win 7 Enterprise 64bit
Intel core i7 2600K Clocked @ 4.7GHz
Nvidia GTX 580
I have dual screens, moved my browser to the right hand screen and now it jumps around several times a day, usually ending up in the middle of my left hand screen. A real annoyance.